<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<script>
    //1.无参无返回值
    function f1() {
        console.log("f1")
    }
    f1()
    //2.有参无返回值
    function f2(name,age) {
        console.log(name+":"+age)
    }
    f2("马尔扎哈",66)
    //3.无参有返回值
    function f3() {
        return"希尔瓦娜斯"
    }
    let info = f3();
    console.log(info)
    //4.有参有返回值
    function f4(x,y) {
        return x*y
    }
    let result = f4(5,6)
    console.log(result)
</script>
</body>
</html>